Trash to Treasure: Waste Eggshells Used as Reactor and Template for Synthesis of Co9S8 Nanorod Arrays on Carbon Fibers for Energy Storage

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• 作者：Xinghua Meng ; Da Deng
• 刊名：Chemistry of Materials
• 出版年：2016
• 出版时间：June 14, 2016
• 年：2016
• 卷：28
• 期：11
• 页码：3897-3904
• 全文大小：549K
• 年卷期：0
• ISSN：1520-5002

文摘

The disposal of eggshell waste is an environmentally and economically challenging problem. We demonstrate here a novel application of waste eggshell as a multifunctional reaction system to regulate the reactants and pH inside the reactor and using eggshell membrane as protein-based and active substrates to collect the nanostructures formed in a controlled environment. We outline an idea of transferring waste eggshell (or “trash”) into a unique reaction system (or “treasure”) for the synthesis of 1-D nanorod arrays on eggshell membrane protein fibers. Subsequently, the intrinsic sulfur element contained in the eggshell membrane protein fibers is utilized to transform the Co(OH)₂ nanorod arrays into Co₉S₈ nanorod arrays. Meanwhile, the protein fibers are in situ carbonized into carbon fibers. The as-synthesized composite of crystalline Co₉S₈ nanorod arrays on carbon fibers is demonstrated to be a potential electrode for both lithium-ion and sodium-ion batteries. The idea of in situ carbonization and sulfurization based on proteins could be generalized for the synthesis of a composite of carbon and sulfides.